1991 Chevy Blazer knocking noise

KCWRESTLER08

MEMBER
1991 CHEVROLET BLAZER
6 CYL
4WD
AUTOMATIC
80,197 MILES

Sometimes when idling and driving there is a knocking sound it doesnt sound like it is coming from the engine more like underneath the driver seat. What could this be

Tuesday, December 9th, 2008 AT 12:06 AM

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

Hi:
There really isn't anything under the seat that would cause the described noise. The next time you hear it, see if you can get a different location of the noise. It could be coming from the rear main or the trans.

Let me know what you find.

Joe

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Tuesday, December 9th, 2008 AT 1:31 PM

KCWRESTLER08

MEMBER
2 POSTS

I think it may be the transfer case for my four wheel drive. But im not sure

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Wednesday, December 10th, 2008 AT 10:55 AM

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

When you get a chance. Check the drive shaft yoke where it goes in the transfer case. See if there is any play (up / down / left / right) and let me know what you find. There is a bearing in the tail shaft housing that may be giving you trouble.

Joe

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Wednesday, December 10th, 2008 AT 1:20 PM